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    <title>Document</title>
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    <script>
      async function fn() {
        try {
          // pending
          let p = new Promise((resolve, reject) => {});
          await p;
          console.log(123);

        } catch (e) {
          console.log(456)

        }
      }

      fn();


      let p = new Promise((resolve, reject) => {})
      p2
      .then(v => {
        console.log(111)
      }, r => {})
      .then(v => {
        console.log(222)
      }, r=>{})
    </script>
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